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A316124
Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
0
0, 7, 60, 1112, 58172, 6605359, 1573249156, 869530995479, 1186105791644202
OFFSET
1,2
COMMENTS
Diagonal of A316130.
EXAMPLE
Some solutions for n=5
..0..1..1..1..0. .0..1..1..1..0. .0..0..0..0..1. .0..1..1..0..1
..1..0..1..0..1. .0..0..1..1..1. .0..1..1..0..0. .1..1..0..1..0
..1..1..1..1..1. .0..1..1..1..1. .0..0..0..0..1. .0..0..0..1..0
..1..0..1..1..0. .0..0..1..0..1. .1..0..0..0..0. .0..0..1..1..0
..0..0..1..1..1. .1..0..1..1..0. .0..0..0..1..0. .1..0..1..0..0
CROSSREFS
Cf. A316130.
Sequence in context: A222651 A287689 A289874 * A358323 A156545 A292004
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 24 2018
STATUS
approved